package facade;

/**
 * @Author liangliangzhao
 * @data 2023/4/14 11:27
 */

public class Stereo {
    private static Stereo instance = new Stereo();

    public static Stereo getInstance(){
        return instance;
    }

    public void on(){
        System.out.println(" Stereo on ");
    }

    public void off(){
        System.out.println(" Stereo off ");
    }

    public void up(){
        System.out.println(" Stereo up... ");
    }
}
